===================================================== BUG: KMSAN: uninit-value in hsr_register_frame_in+0x374/0x380 net/hsr/hsr_framereg.c:439 hsr_register_frame_in+0x374/0x380 net/hsr/hsr_framereg.c:439 hsr_forward_skb+0xf0e/0x3470 net/hsr/hsr_forward.c:619 hsr_handle_frame+0x9d6/0xac0 net/hsr/hsr_slave.c:69 __netif_receive_skb_core+0x2171/0x5de0 net/core/dev.c:5359 __netif_receive_skb_one_core net/core/dev.c:5463 [inline] __netif_receive_skb+0xf2/0x630 net/core/dev.c:5579 netif_receive_skb_internal+0x1b3/0x3c0 net/core/dev.c:5665 netif_receive_skb+0x49/0x360 net/core/dev.c:5724 tun_rx_batched+0xadd/0xd50 tun_get_user+0x56e3/0x5b20 drivers/net/tun.c:1912 tun_chr_write_iter+0x407/0x580 drivers/net/tun.c:1942 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x1318/0x2030 fs/read_write.c:590 ksys_write+0x28b/0x510 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was stored to memory at: hsr_fill_frame_info+0x74e/0x770 net/hsr/hsr_forward.c:536 fill_frame_info net/hsr/hsr_forward.c:602 [inline] hsr_forward_skb+0x793/0x3470 net/hsr/hsr_forward.c:616 hsr_handle_frame+0x9d6/0xac0 net/hsr/hsr_slave.c:69 __netif_receive_skb_core+0x2171/0x5de0 net/core/dev.c:5359 __netif_receive_skb_one_core net/core/dev.c:5463 [inline] __netif_receive_skb+0xf2/0x630 net/core/dev.c:5579 netif_receive_skb_internal+0x1b3/0x3c0 net/core/dev.c:5665 netif_receive_skb+0x49/0x360 net/core/dev.c:5724 tun_rx_batched+0xadd/0xd50 tun_get_user+0x56e3/0x5b20 drivers/net/tun.c:1912 tun_chr_write_iter+0x407/0x580 drivers/net/tun.c:1942 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x1318/0x2030 fs/read_write.c:590 ksys_write+0x28b/0x510 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was created at: __alloc_pages+0xbbf/0x1090 mm/page_alloc.c:5409 alloc_pages+0x8a5/0xb80 skb_page_frag_refill+0x34f/0x7a0 net/core/sock.c:2705 tun_build_skb+0x248/0x1d60 drivers/net/tun.c:1589 tun_get_user+0x10a9/0x5b20 drivers/net/tun.c:1728 tun_chr_write_iter+0x407/0x580 drivers/net/tun.c:1942 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x1318/0x2030 fs/read_write.c:590 ksys_write+0x28b/0x510 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 1 PID: 10859 Comm: syz-executor.1 Tainted: G W 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================